COVER AS 3573846 - Caterpillar

Model Views
Illustration 1 g00354026
Top view of engine
Illustration 2 g00354027
Right side view of engine
Illustration 3 g00354028
Front view of engine
Illustration 4 g00354029
Rear view of engineEngine Information
The Caterpillar 3412C Generator Set Engine uses a microprocessor based electronic engine control. This control provides the following items:
Electronic governing
Automatic fuel ratio control
Torque rise shapingThere are two data links for communication. The first data link monitors the characteristics of the engine. The other data link provides diagnostic information.This engine has the following qualities.
Twin turbochargers in series
Jacket water aftercooled
Direct fuel injectionThe engine has a SAE No. 0 (zero) flywheel housing. This engine has dual viscous dampers. The engine is designed for either right hand service or left hand service. The engine is designed to fit within a 1220 mm (48 inch) width for oil well service applications.The engine has individual injection pumps and fuel lines. There is one injection pump for each cylinder. The injection pumps provide the following functions:
metering high pressure fuel to each of the fuel injector nozzles
pumping high pressure fuel to each fuel injector nozzleThe fuel injector lines are made of high strength steel and these lines have a collar flange. The collar assembly at the end of the fuel line reinforces the fuel line connection. The collar assembly also increases system reliability.The 3412C Generator Set fuel system is a system for high capacity. The following changes to the engine are listed below:
Increased area of the plunger
Camshaft with a longer stroke
Camshaft with a higher injection cycleThese changes influence the following items.
Significant increase in injection pressure
Increase in volume
Reduction in injection durationThis will yield the following benefits:
Higher power output
Cleaner combustion
Lower smoke levels
Improved fuel economyA full range electronic governor controls the fuel injection pump output. This maintains the engine rpm that is called for by the throttle position sensor.The cooling system has a gear-driven centrifugal pump. There are two thermostats which regulate the coolant temperature. A customer supplied fan drive and a cooling system (radiator) is required.The engine lubricating oil is cooled and filtered. The cooling oil for the engine is supplied by a gear-driven pump. Bypass valves provide the following benefits:
If the oil viscosity is high, there is an unrestricted flow of lubrication oil to the engine parts.
If the oil cooler is plugged, there is an unrestricted flow of lubrication oil.
If the oil filter elements are plugged, there is an unrestricted flow of lubrication oil.Starting the Engine
There is a slightly longer cranking period for an engine that is equipped with Electronic Controls than a mechanically governed engine. In order to move the rack, oil pressure is required for the electronic actuator. The check engine light should be ON while the engine is cranking. The check engine light should go OUT after the engine oil pressure is achieved. At temperatures below 0 °C (32 °F), starting fluid may need to be sprayed into the air cleaner inlet. If the engine fails to start in 30 seconds, the starter switch should be released. The starting motor should be allowed to cool for two minutes before being used again. Refer to Operation